/* -------------------------------------------------------------------------
 *
 * ts_locale.h
 *		locale compatibility layer for tsearch
 *
 * Copyright (c) 1998-2012, PostgreSQL Global Development Group
 *
 * src/include/tsearch/ts_locale.h
 *
 * -------------------------------------------------------------------------
 */
#ifndef __TSLOCALE_H__
#define __TSLOCALE_H__

#include <ctype.h>
#include <limits.h>

#include "utils/pg_locale.h"
#include "mb/pg_wchar.h"

/*
 * towlower() and friends should be in <wctype.h>, but some pre-C99 systems
 * declare them in <wchar.h>.
 */
#ifdef HAVE_WCHAR_H
#include <wchar.h>
#endif
#ifdef HAVE_WCTYPE_H
#include <wctype.h>
#endif

/* working state for tsearch_readline (should be a local var in caller) */
typedef struct {
    FILE* fp;
    const char* filename;
    int lineno;
    char* curline;
    ErrorContextCallback cb;
} tsearch_readline_state;

#define TOUCHAR(x) (*((const unsigned char*)(x)))

#ifdef USE_WIDE_UPPER_LOWER

extern int t_isdigit(const char* ptr);
extern int t_isspace(const char* ptr);
extern int t_isalpha(const char* ptr);
extern int t_isprint(const char* ptr);

/* The second argument of t_iseq() must be a plain ASCII character */
#define t_iseq(x, c) (TOUCHAR(x) == (unsigned char)(c))

#define COPYCHAR(d, s)                                      \
    do {                                                    \
        int rc = memcpy_s(d, pg_mblen(s), s, pg_mblen(s));  \
        securec_check(rc, "", "");                          \
    } while (0)

#else /* not USE_WIDE_UPPER_LOWER */

#define t_isdigit(x) isdigit(TOUCHAR(x))
#define t_isspace(x) isspace(TOUCHAR(x))
#define t_isalpha(x) isalpha(TOUCHAR(x))
#define t_isprint(x) isprint(TOUCHAR(x))
#define t_iseq(x, c) (TOUCHAR(x) == (unsigned char)(c))

#define COPYCHAR(d, s) (*((unsigned char*)(d)) = TOUCHAR(s))
#endif /* USE_WIDE_UPPER_LOWER */

extern char* lowerstr(const char* str);
extern char* lowerstr_with_len(const char* str, int len);

extern bool tsearch_readline_begin(tsearch_readline_state* stp, const char* filename);
extern char* tsearch_readline(tsearch_readline_state* stp);
extern void tsearch_readline_end(tsearch_readline_state* stp);

extern char* t_readline(FILE* fp);

#endif /* __TSLOCALE_H__ */
